Windows/Mac/Linux (Thunderbird): Harness the to-do-managing power of Remember the Milk from inside your mail reader with an alpha extension for Thunderbird. Once installed and authenticated with your RTM account, the task manager provided by the Lightning extension will have bi-directional access to your tasks, which you can add, delete, modify, and prioritize from inside your mail manager. Hit the video above to see a few of the things you can do with the extension, and hit the via link below for step-by-step installation instructions. Remember the Milk Provider extension is a free download, but requires a free Mozilla Add-Ons account to download, needs the Lightning calendar extension, and works wherever Thunderbird does.